Rear suspension and noise

Current lift set up:
Bilstein 5100 x4
887 Coils up front
LR UCA's
1.5" Rear block and stock leaf pack 3+1.

My front sits slightly higher than the rear, and I don't mind it at all.
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I've had the lift installed for approximately 5 months. Whenever I go over a bump (whether its small or big), I hear a rattle/clunk toward the rear of the vehicle. Could it possibly be that the U-Bolts have loosened up and need to be tightened again after the suspension has broken in?

Secondly, I want to eventually get rid of the 1.5" block. My other question is, if I get rid of the rear block what is a good option to take its place? As of now I don't tow, and hardly have anything "heavy" in the bed. Should I get rid of the block and get an AAL to maintain the look of the lift? Or should I get a full new leaf pack? I know a lot of people run Dakar, but it seems they stiffen the ride a whole lot and are mostly used for people that carry weight or tow. I would like to find an option that will give me the current lift numbers that I have in the rear but that are better than a block.

thanks

 

Bump

 

AAL

 

What kind?

 

Wheeler's Off-Road 1.5" aal kit

$77.50

 

Would the wheelers progressive 3 leaf pack be better?

 

^Yes it's better than the single-leaf AAL kits, and costs twice as much.

Better still would be the 8-leaf pack, but it's $600:

 

I think I'll opt for the progressive 3 leaf, I just dropped mad coin on the pro grill and shift knob haha